His birthday is coming soon and you need the perfect card. You have one for your brother, sister, husband, wife, father, mother, son or daughter, but what about the brother-in-law? Brother-in-laws should receive the same special attention as your other family members.
It is your brother-in-law's birthday, and you want to make him laugh. You can make a joke about him being married to your sister, but be careful not to offend him. Going overboard can do more harm than good.
Make it about you: "I'm glad you are still sticking around here. Oh, that's because I made your favourite cake." Or make a joke about your sister: "Congratulations, you are here another year. You must really love my sister."
Maybe you can't think of a joke that your brother-in-law would like. The key is to acknowledge his birthday and your appreciation of him being part of your family.
Always a nice sentiment: "Happy Birthday to the best brother-in-law anyone could have."
Make him relax: "It is your day. Kick your feet up, have a beer and enjoy yourself."
Praise him: "My sister is the luckiest girl in the world. I am the next luckiest to have a brother-in-law like you."
Write It Yourself
Perhaps the funny or sentimental ideas are not saying what you feel. You might want to write something more personal to him. You could describe your admiration for him as a great brother-in-law, husband and father. Let him know that you notice his hard work and caring spirit. Comment on your friendship with him and what he means to your family.
Using your own words in your own handwriting will make a great touch. He will not forget such a personal gift.